Nor is it only the limits inherent in the specific character of each kind of art that the artist ought to overstep in putting his hand to the work; he must also triumph over those which are inherent in the particular subject of which he treats. In a really beautiful work of art, the substance ought to be inoperative, the form should do everything; for by the form, the whole man is acted on; the substance acts on nothing but isolated forces. Thus, however vast and sublime it may be, the substance always exercises a restrictive action on the mind, and true aesthetic liberty can only be expected from the form. Consequently the true search of the master consists in destroying matter by the form; and the triumph of art is great in proportion as it overcomes matter and maintains its sway over those who enjoy its work. It is great particularly in destroying matter when most imposing, ambitious, and attractive, when therefore matter has most power to produce the effect proper to it, or, again, when it leads those who consider it more closely to enter directly into relation with it. The mind of the spectator and of the hearer must remain perfectly free and intact; it must issue pure and entire from the magic circle of the artist, as from the hands of the Creator. The most frivolous subject ought to be treated in such a way that we preserve the faculty to exchange it immediately for the most serious work. The arts which have passion for their object, as a tragedy for example, do not present a difficulty here; for, in the first place these arts are not entirely free, because they are in the service of a particular end (the pathetic), and then no connoisseur will deny that even in this class a work is perfect in proportion as amidst the most violent storms of passion it respects the liberty of the soul. There is a fine art of passion, but an impassioned fine art is a contradiction in terms, for the infallible effect of the beautiful is emancipation from the passions. The idea of an instructive fine art (didactic art) or improving (moral) art is no less contradictory, for nothing agrees less with the idea of the beautiful than to give a determinate tendency to the mind.